Return trap



C. H. DUTCHER RETURN TRAP Jail. 15, 1929. 1,699,464

Filedv July 1'?, 1926 2 Sheets-Sheet l ATTORNEYS `Jan.'l5, 1929. 1,599,464 c. H. DUTCHER RETURN TKA? Filed July 17. 192.6 2 Smets-Sheet 2 WITNEssEs INVENTQR .MM Hincha i Mfhxgpf BY M ATTORNEYS Patented Jan. 15, 1929.

UNITED STATES maar vorties.

CHARLES H. DUTCHER, OF JERSEY CITY, NEVT JERSEY, ASSGNOR TO KIELEY 8c MUEL- i LER, INC., OF NE1/V`YORK, N. Y., A CORPORATON 0F NEW YORK.

RETURN TRAP.

Application iled July 17,

This invention relates to return traps adapted to be installed in steam systems tor receiving and returning the water ot condensation to the boiler and for simultaneously eliminating air from the system.

Une of the principal objects of the present invention is to provide an improved return trap in which the valves f and all working parts of the device are housed within the trap body so as to conceal and protect the same and dispose the valve elements at a point where they are subjected to a balanced condition.

The invention furthermore comprehends a trap including steam supply and vent valves having oppositely seating valve elements whereby the valve element controlling the entrance of steam to the trap is maintained in closed condition by the steam pressure and when steam pressure is in the trap equalization on opposite sides of the valve element minimizes the tension .necessary to open the same, while the steam pressure when admitted'to the trap operates as an auxiliary means for closing the valve element of the vent valve.

The invention furthermore comprehends a condensation return trap for steam heating systems in which the water oi' condensation is returned by gravity thereby greatly increasing circulation.

As a still further object the invention contemplates a condensation water return for steam heating systems including vent and steam inlet valves simultaneously actuated by a float-controlled means which rises and falls a given distance before operation of the valves is effected by a past-center spring-operated toggle.

The invention further aims to provide acondensation water return for steam heating systems which is comparatively simple in its construction and mode of operation, which is highly eliicient in its purpose and which is economical to produce and install.

With the above recited and other objects in view,- reference is had to the following specification and accompanying drawings in which there is exhibited one example or embodiment ofthe invention which is in no way intended as a limitation uponthe scope of the appended claims as it is to be clearly understood that variations and modifica- 1926. Serial No. 123,242.

tions may be resorted to when found eX- pedient.

In the drawings- Figure l is a vertica through the trap body 5 Fig. 2 is an enlarged fragmentary'horizontal sectional. view taken approximately on the line .22 et Fig. 1. v u

Fig. 3 is an enlarged 'fragmentary vertical sectional view taken approximately on the line 3 3 of Fig. l;

Fig. l is a diagrammatic view illustrating the manner. in which the trap is installed.

Referring togthe drawings by characters of reference, and more particularly to Fig. 4l, A designates the boiler from which. the steam supply line B leads. r1`he return trap designated generally by the reference charactor C, is provided with an outlet pipe l) communicating with the lower end and connected by a pipe E with the water chamber of the boiler, the pipe E having a check valve F and a cut-off valve Gr. At its upper end the trap C has connected and coinmunicating therewitlna returnpipe H provided with a check'valve I and a cut-off valve J. The trap C includesV a body 5 formed with a laterally projecting neck 6 at its upper end, the outer end of which neck is open and formed with. a flange 7. A closure plate 8 is bolted or otherwise secured to the flange for covering the neck. The cover plate also constitutes a support for a valve cz sting 9 which includes a steam inlet valve 10 and a vent or exhaust valve 1l, the former valve l() communicating sectional view through a feed pipe K with the supply line B, the pipe K having a cut-oil' valve L. The latter valve 11 communicates with a vent or discharge conduit M which communicates with the atmosphere. The valve 10 is provided with an internal valve seat l2 with which a valve element or disk 13 seats upon upward movement. The valve 1l is provided with an external valve seat ll-with which a valve element or disk l5 seats upon downward movement. The valve casting further comprises a pair of bearingar'ms 1G Vin which a shaft 17 is mounted for rotation.

rIhe shaft 17 has keyed thereto adjacent its opposite ends, sleeves 18 and 19 provided, respectively, lwith radially disposed arms 2() and 21, the former connected by a link 22 .B end the interior ofthe tren bod With the stein 23 of the Valve 13 and the letter connected by e link 24 With the stein 25 of the valve l5 so that rotetory movement of the shaft 17 in opposite directions, simultaneously effects the closinp` or seating of one Valve and the unseuting of the other Valve.v .ln order to provide ineens for eilecting rotetory movements of the shalt l?, u i'loet 26 having en erin 27 is ulcruined et to e depending; bearing lug 29 on the valve casting 9. rlhe Hoet erin 27 connected to e rock lever 30 by en adjustable connet'E rod 3l which includes tclescopicelly adjustable sections 32 und 'lhe roel;v .over 253() is provided with e niediel hub SDA mounted or fulcruined on the shaft i7 and hes its 'izi'ee outer-'end pivotolly connected et to the A yoke or bifurcated end ci e stein o?. toggle including spaced parallel arms 38 end e bight or cross conneting element 39, keyed or connected at the it: ,e end of the :nuns to the shaft 17. vThe ci lt @T055 connecting' element 39 is epertured to slidebly receive the free end el the stein 3? end the stein 37 is formed adjacent its bi'furceted inner end with an adjustable spring,` sect or abutment Ll0. A coiled expansion spring Lll is interposed between the adjustable seat or abutment Zl() end the bight or cross connecting element 3), and surrounds the stein 87.

ln use and operation, the trap is installed approximately twenty-'four inches higher then the Weterline of the boiler and the Water oli condensation Yfrom the system llows through the return pipe H to the trop body. At this time the lloret controlling` the Valve assemblage is in e position to dispose `the Valve element l closed end the vulve elcinent l5 opened so that pressure fronti the toed pipe B is cut oli' from the interior of the tmp body While the vent M is open to the atmosphere. As the voilier olf condense-- tion reaches e.. predcterniincul level7 the lio" 243 elevated thereby e'liects upward movement olf the inner end el? the rock lever 3.() duc to its connection therenfitli :it 1d lowc s the outer end ofi the roclc lever so tl'uit the spring" il operates to shilit the outer endl oil the yol'ie upwardly, reversing;l the pos 'on ol the Valve elements l5 end l5V sinnilteneously. rlhis closes the Veut l5 end; est blishes coni.- niunicetion between the steein sup'ily line through the vent pipe K. rllie pressure Within the trap is thus raised to boiler pressure sov that the Water ol' condensation flows by gravity through the outlet pipe l), check Valve l? and return pipe lll to the boiler. As the level of condensation reaches e predetermined point, the fleet 26 fat-lling therewith, reverses the operation of the valve elements 13 and l5: until e new supply of condensation fills the trepto e predetermined high level; Under this arrangement, it obvious that no Waiter of condensation posses through the Valves whatsoever While the valve esseniblfige oper etes merely Vent the trap to callow the free entrance of Water of condensation sind the escape oi' eir from the systern7 While permitting` boiler steern pressure to enter the trap for equelizing` the pressure end allowing gravitation ol the condensation collected in the trap beck, to the boiler.

will be further noted that the steeni pressure is et all times, when the steein inlet valve is closed, on that side 'of the solve for iiorcingg and maintaining the seine in closed coiulition, thereby preventineentrai-nce steam to the trap except upg i proper operetion of the y: irc. llurtheiniore, by haring both Volvo elements operate sirnul'n,.ieously,

` need condi ion is set up which eliminotes t springs or toggles. lt will be further noted thet the fleet, due to the togglenrrengeinent, rises end felis e given dif-nance before the valve are operated.

The trap es forth is especially designed for low-pressure systems such es vapor teins, Which Work on pressure from one,- querter to one pound but muy be used up to fifteen-pound pressure i I l. 'ln :i condensetion trap oi the clees clescribcd, pressure intake and vent Valves end o Valve controllingv inechenisin comprising; e rock shaft operatively connected with the valves, e lever mounted on and turneble with respect to the shalt, a. float connected to one end of the lever, e yoke connected to said rock shaft, e. stein piyotelly connected to the reineinil@` end ol the lever une slidebly essocieted with the free end of the yoke and a. coiled expansion spring; surrounding the stein for exerting' a pressure on the free end of the yoke to eliect swinging movements of the seine when the lever is roclnd `in opposite directions by the lloet wluireby lao :ilteri-mtclly cliect sinnxl'nn-cous openly o 'l onev vzilvc und the closing` olf the other.

2. ln u condensation trop ii -clalulngg :i trap body lumf'ingg :L con, eilen inlet and out i let mul :1. slceln iiilnle Vent,V andi n Velvcd steeni inlet and valves@ Vent, niecl-Iienisni for effecting the siniultineens opening oli' one valve end' c-l e roclr shalt operetively connected with the lives, e lever mounted on and roclnble with respect to the shalt.j e. fleet connected to one end of the lever, e yoke secured to the rocl she'lit, e stein pivot-elly connected to the reinein'ng end of the lever end bovine si'. L- ing connection with; the' ree'- of the Volte and ineens exerting' .e pressure on the free ena/il yole Vto` effect swinging incre-nient oliV the seine when the lever is rocked in opposite directions;y

CHARLES n. perenne.

the necessity oi the use ol hearty' of the other comprising llll) 

